OPEC Monthly Report: Iran's Oil Output Plunged 19% Last Month, 2025 Oil Demand Forecast Cut
Taylor Wilson
OPEC's monthly report shows Iran's crude output fell 546,000 barrels per day — a 19% drop — to 2.33 million b/d; the same report cut 2026 global demand growth to 970,000 b/d, squeezing both sides of the oil equation at once.
Why did Iran's output collapse so suddenly?
Iran's crude production fell 546,000 b/d from the prior month, a 19% decline, to 2.33 million b/d.
This means → the U.S. port blockade on Iran is now translating directly into lost barrels — export channels are choked, so production has to shrink.
In plain terms = if you can't ship the oil, you have to shut in the wells. The longer the blockade lasts, the harder it is to hold output steady.
Another demand downgrade — how serious is it?
OPEC cut its 2026 global oil demand growth forecast to 970,000 b/d — the second consecutive monthly downgrade.
Supply is shrinking fast on the Iran side; demand expectations are weakening on the other — both pressures landed in the same report.
This means → the market faces "sudden supply loss" and "softer-than-expected demand" simultaneously, making the direction of oil prices harder to call.
OPEC vs. EIA and IEA — who has it right?
The U.S. Energy Information Administration (EIA) and the International Energy Agency (IEA) both project 2026 global oil demand will decline; OPEC still sees positive growth.
OPEC argues the Iran conflict will hurt consumption less than other agencies estimate, and it raised its 2027 demand growth forecast.
This reflects a distinctly more optimistic baseline on medium-term demand recovery — but the wider the gap between OPEC and its peers, the more the market questions the credibility of OPEC's own output policy.
What to watch next?
Whether Iran's output can recover hinges on one variable: the trajectory of the U.S. blockade — if it holds, production stays depressed.
The demand-forecast gap between OPEC and EIA / IEA has not narrowed, and will keep shaping market trust in OPEC's cut-or-add decisions.
In plain terms = two things set the direction for oil prices: whether the blockade eases, and whether OPEC's forecasts prove accurate. Right now, neither answer is settled.
Content is for reference only, not financial advice.